Earth & Environmental Sciences
catalytic converter
100%
fuel cell
78%
emission control
77%
power generation
72%
replacement
57%
oxide
52%
stack
51%
combustion engine
36%
electrical power
35%
energy
27%
alternative energy
26%
chemical
20%
hydrocarbon
19%
waste heat
18%
heat production
17%
precious metal
16%
pollutant emission
15%
platinum
15%
need
15%
nitrogen oxides
14%
carbon monoxide
13%
emission reduction
13%
control system
13%
fossil fuel
12%
air quality
11%
water vapor
11%
carbon dioxide
11%
combustion
10%
industry
8%
climate change
8%
resource
7%
product
6%
Engineering & Materials Science
Catalytic converters
93%
Emission control
85%
Solid oxide fuel cells (SOFC)
75%
Power generation
59%
Internal combustion engines
27%
Hydrocarbons
24%
Renewable energy resources
22%
Precious metals
18%
Exhaust systems (engine)
17%
Nitrogen oxides
16%
Platinum
16%
Water vapor
15%
Waste heat
15%
Carbon monoxide
15%
Climate change
15%
Air quality
15%
Metal foil
15%
Fossil fuels
13%
Automotive industry
13%
Carbon dioxide
12%
Recovery
9%
Chemical analysis
9%
Control systems
8%
Testing
7%
Chemical Compounds
Internal Combustion Engine
35%
Energy
33%
Waste Heat
17%
Hydrocarbon
16%
Nitrogen Oxide
14%
Fossil Fuel
13%
Foil
11%
Water Vapor
11%
Carbon Monoxide
10%
Environmental Pollutant
9%
Carbon Dioxide
9%
Industry
8%
Platinum
8%
Environment
6%
Reduction
5%
Metal
5%